Where does the water in 78629 come from?

Water for zip code 78629 in Gonzales, Texas is provided by 2 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 78629

Gonzales, Texas · Gonzales County

16 PPM

0.9 GPG

Soft

0Soft60120180300+

High Confidence — USGS Monitoring

Dataset updated March 9, 2026Matched to 2 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 2 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis

2 USGS-backed sources

2 matched systems total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.

Water source profile

Primarily surface water

Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.

Data recency

March 9, 2026

Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems Serving 78629

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

2 water systems

PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.

Water System	Source	Hardness	Pop. Served	Data Source
Gonzales County Wsc TX0890006	surface water	16 PPM Soft	10,350	High Confidence — USGS Monitoring
City Of Gonzales TX0890001	surface water	16 PPM Soft	9,172	High Confidence — USGS Monitoring

Gonzales County Wsc

TX0890006

Soft

16 PPMsurface water10,350 servedHigh Confidence — USGS Monitoring

City Of Gonzales

TX0890001

Soft

16 PPMsurface water9,172 servedHigh Confidence — USGS Monitoring

Nearby Zip Codes

7861416 7865816 77984247 7812216 7863216 7895940 78648283 7815919 7814022 7797515 77994185 78638238

What This Means For You

Recommendations are based on the displayed ZIP hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Your Water Is Soft

Your water hardness is in the soft range. You likely don't need a water softener. Enjoy your naturally soft water!

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Gonzales, TX (78629).

Submit Your Data

Frequently Asked Questions

Is the water hard in Gonzales, TX (78629)?

The average water hardness in 78629 is 16 PPM (0.9 GPG), which is classified as soft.

Do I need a water softener in 78629?

At 16 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 78629 safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve 78629?

Zip code 78629 in Gonzales, Texas is served by 2 water systems.

Learn More About Your Water

Water Hardness Scale: PPM and GPG Chart

Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.

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Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

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